SYMPOSIA PAPER Published: 01 January 2001
STP13582S

Reactor Dosimetry in the Surveillance Program of Kozloduy NPP Reactor Pressure Vessels

Source

The neutron fluence determination methods and approaches applied for Kozloduy NPP reactors of type VVER-1000, Units 5 and 6, and VVER-440, Units 1 to 4, according to the Reactor Pressure Vessel Surveillance Program, are presented. The verification/validation of calculated neutron fluence is carried out by measured activity of ex-vessel detectors installed in the air cavity behind the vessels on units 1 to 6. A methodology for estimation of the neutron fluence for VVER-1000/320 reactor has been developed and applied to surveillance assemblies' sets 1L and 2L of Unit 5 for an assessment of the vessel current embrittlement and prognosis.

Author Information

Ilieva, KD
Institute for Nuclear Research & Nuclear Energy of Bulgarian Academy of Sciences, Sofia, Bulgaria
Belousov, SI
Institute for Nuclear Research & Nuclear Energy of Bulgarian Academy of Sciences, Sofia, Bulgaria
Apostolov, TG
Institute for Nuclear Research & Nuclear Energy of Bulgarian Academy of Sciences, Sofia, Bulgaria
Monev, M
Kozloduy NPP, Bulgaria
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Details
Developed by Committee: E10
Pages: 77–84
DOI: 10.1520/STP13582S
ISBN-EB: 978-0-8031-5450-6
ISBN-13: 978-0-8031-2884-2